/* ========================================
   NEXBUILD - Dark Tech Construction
   Colors: #0D0D1A + indigo→cyan gradient
   Font: Sora + Noto Sans JP
   ======================================== */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0D0D1A;
  --bg-light: #13132B;
  --bg-card: rgba(255,255,255,0.04);
  --text: #E0E0F0;
  --text-dim: #8888AA;
  --indigo: #6366F1;
  --cyan: #06B6D4;
  --gradient: linear-gradient(135deg, #6366F1, #06B6D4);
  --gradient-text: linear-gradient(135deg, #818CF8, #22D3EE);
  --glass-border: rgba(255,255,255,0.08);
  --glass-bg: rgba(255,255,255,0.03);
  --radius: 16px;
  --font: 'Sora', 'Noto Sans JP', sans-serif;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; overflow-x: hidden; -webkit-font-smoothing: antialiased; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 720px; }

/* Gradient text */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Glassmorphism cards */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.glass-card:hover {
  border-color: rgba(99,102,241,0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(99,102,241,0.15);
}

/* ===== SAMPLE BANNER ===== */
.sample-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 99999;
  background: rgba(99,102,241,0.9); backdrop-filter: blur(8px);
  color: #fff; text-align: center; padding: 10px 16px;
  font-size: 13px; letter-spacing: 0.02em;
}

/* ===== PARTICLE CANVAS ===== */
#particleCanvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}

/* ===== HEADER ===== */
.header {
  position: fixed; top: 40px; left: 0; right: 0; z-index: 1000;
  padding: 0 24px; transition: all 0.3s;
}
.header.scrolled {
  top: 40px;
  background: rgba(13,13,26,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}
.header__inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.header__logo {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; color: var(--text);
}
.logo-icon { display: flex; }
.logo-text {
  font-size: 20px; font-weight: 700; letter-spacing: 0.04em; line-height: 1.2;
}
.logo-text small { display: block; font-size: 10px; font-weight: 400; color: var(--text-dim); letter-spacing: 0.08em; }
.header__nav {
  display: flex; align-items: center; gap: 32px;
}
.header__nav a {
  text-decoration: none; color: var(--text-dim); font-size: 14px; font-weight: 500;
  transition: color 0.3s; letter-spacing: 0.02em;
}
.header__nav a:hover { color: var(--text); }
.nav-cta {
  background: var(--gradient) !important; color: #fff !important;
  padding: 10px 24px !important; border-radius: 100px;
  font-weight: 600 !important;
}

.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  width: 32px; height: 24px; position: relative; z-index: 1001;
}
.hamburger span {
  display: block; width: 100%; height: 2px; background: var(--text);
  position: absolute; left: 0; transition: all 0.3s;
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 0; }
.hamburger.active span:nth-child(1) { top: 50%; transform: translateY(-50%) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { bottom: 50%; transform: translateY(50%) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  justify-content: center; text-align: center; overflow: hidden; background: url("https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=1920&q=80") center/cover no-repeat; background: url("") center/cover no-repeat;
  padding: 120px 24px 80px;
}
.hero__orbs {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 0;
}
.orb {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4;
  animation: orbFloat 12s ease-in-out infinite;
}
.orb--1 {
  width: 500px; height: 500px; top: 10%; left: 15%;
  background: radial-gradient(circle, #6366F1, transparent 70%);
  animation-delay: 0s;
}
.orb--2 {
  width: 400px; height: 400px; top: 50%; right: 10%;
  background: radial-gradient(circle, #06B6D4, transparent 70%);
  animation-delay: -3s;
}
.orb--3 {
  width: 350px; height: 350px; bottom: 10%; left: 40%;
  background: radial-gradient(circle, #8B5CF6, transparent 70%);
  animation-delay: -6s;
}
.orb--4 {
  width: 300px; height: 300px; top: 30%; left: 60%;
  background: radial-gradient(circle, #0EA5E9, transparent 70%);
  animation-delay: -9s;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(40px, -30px) scale(1.1); }
  50% { transform: translate(-20px, 40px) scale(0.9); }
  75% { transform: translate(30px, 20px) scale(1.05); }
}
.hero__grid-lines {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background-image:
    linear-gradient(rgba(99,102,241,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.06) 1px, transparent 1px);
  background-size: 80px 80px;
  z-index: 1;
}
.hero__content { position: relative; z-index: 2; max-width: 800px; }
.hero__label {
  font-size: 14px; font-weight: 500; color: var(--cyan);
  letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 24px;
}
.hero__title {
  font-size: clamp(40px, 7vw, 80px); font-weight: 800;
  line-height: 1.15; margin-bottom: 24px; letter-spacing: -0.02em;
}
.hero__desc {
  font-size: 17px; color: var(--text-dim); line-height: 1.8;
  margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto;
}
.hero__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.hero__scroll-indicator {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  z-index: 2;
}
.scroll-line {
  width: 1px; height: 48px; background: var(--gradient);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}
.hero__scroll-indicator span { font-size: 11px; color: var(--text-dim); letter-spacing: 0.15em; text-transform: uppercase; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; border-radius: 100px; font-size: 15px;
  font-weight: 600; text-decoration: none; transition: all 0.3s;
  letter-spacing: 0.02em; cursor: pointer; border: none;
}
.btn--gradient {
  background: var(--gradient); color: #fff;
  box-shadow: 0 4px 20px rgba(99,102,241,0.3);
}
.btn--gradient:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,0.4); }
.btn--glass {
  background: var(--glass-bg); color: var(--text);
  border: 1px solid var(--glass-border);
}
.btn--glass:hover { border-color: rgba(99,102,241,0.4); background: rgba(99,102,241,0.1); }
.btn--full { width: 100%; }

/* ===== METRICS ===== */
.metrics { padding: 80px 0; position: relative; z-index: 2; }
.metrics__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.metric-card {
  padding: 32px 24px; text-align: center;
}
.metric__number {
  font-size: 48px; font-weight: 800;
  background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.metric__unit { font-size: 20px; font-weight: 600; color: var(--cyan); }
.metric__label { display: block; margin-top: 8px; font-size: 13px; color: var(--text-dim); }

/* ===== SECTIONS ===== */
.section { padding: 120px 0; position: relative; z-index: 2; }
.section--dark { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 64px; }
.section-label {
  display: inline-block; font-size: 13px; font-weight: 600; color: var(--cyan);
  letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 16px;
}
.section-title { font-size: clamp(28px, 4vw, 44px); font-weight: 800; line-height: 1.3; }
.section-desc { font-size: 16px; color: var(--text-dim); margin-top: 16px; line-height: 1.8; }

/* ===== VISION ===== */
.vision__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.vision__text p { font-size: 16px; color: var(--text-dim); line-height: 2; margin-bottom: 20px; }
.vision__cards { display: flex; flex-direction: column; gap: 16px; }
.vision-card { padding: 28px; display: flex; gap: 20px; align-items: flex-start; }
.vision-card__icon { font-size: 28px; flex-shrink: 0; }
.vision-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.vision-card p { font-size: 14px; color: var(--text-dim); line-height: 1.7; }

/* ===== TECHNOLOGY ===== */
.tech__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.tech-card { padding: 40px; }
.tech-card__number {
  font-size: 48px; font-weight: 800; opacity: 0.15;
  background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 16px;
}
.tech-card__title { font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.tech-card p { font-size: 15px; color: var(--text-dim); line-height: 1.8; margin-bottom: 20px; }
.tech-card__tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tech-card__tags span {
  padding: 6px 14px; border-radius: 100px; font-size: 12px; font-weight: 500;
  background: rgba(99,102,241,0.1); color: var(--indigo); border: 1px solid rgba(99,102,241,0.2);
}

/* ===== SERVICE ===== */
.service__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-card { padding: 40px; }
.service-card__icon { margin-bottom: 20px; }
.service-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.service-card p { font-size: 15px; color: var(--text-dim); line-height: 1.8; }

/* ===== PROJECTS ===== */
.projects__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project-card { padding: 36px; }
.project-card__category {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--cyan);
  letter-spacing: 0.08em; margin-bottom: 12px; text-transform: uppercase;
}
.project-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.project-card p { font-size: 14px; color: var(--text-dim); line-height: 1.8; margin-bottom: 20px; }
.project-card__stats { display: flex; gap: 12px; flex-wrap: wrap; }
.project-card__stats span {
  padding: 4px 12px; border-radius: 100px; font-size: 12px;
  background: rgba(6,182,212,0.1); color: var(--cyan); border: 1px solid rgba(6,182,212,0.2);
}

/* ===== PROCESS ===== */
.process__timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-step { padding: 36px; text-align: center; }
.process-step__num {
  font-size: 36px; font-weight: 800;
  background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 16px;
}
.process-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.process-step p { font-size: 14px; color: var(--text-dim); line-height: 1.7; }

/* ===== COMPANY TABLE ===== */
.company__table { padding: 48px; max-width: 800px; margin: 0 auto; }
.company__table table { width: 100%; border-collapse: collapse; }
.company__table th, .company__table td {
  padding: 16px 20px; text-align: left; font-size: 15px;
  border-bottom: 1px solid var(--glass-border);
}
.company__table th { width: 180px; color: var(--text-dim); font-weight: 500; white-space: nowrap; }
.company__table td { color: var(--text); }

/* ===== RECRUIT ===== */
.recruit__layout { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.recruit__text .section-label { margin-bottom: 16px; }
.recruit__text .section-title { margin-bottom: 24px; text-align: left; }
.recruit__text p { font-size: 16px; color: var(--text-dim); line-height: 1.8; margin-bottom: 32px; }
.recruit__perks { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.perk { padding: 20px; font-size: 15px; font-weight: 500; }
.perk span { margin-right: 8px; }

/* ===== CONTACT FORM ===== */
.contact-form { padding: 48px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 8px; color: var(--text-dim); }
.required { color: #EF4444; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 14px 18px; border-radius: 12px; border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.03); color: var(--text); font-family: var(--font);
  font-size: 15px; transition: border-color 0.3s; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--indigo);
}
.form-group select { cursor: pointer; }
.form-group textarea { resize: vertical; min-height: 120px; }

/* ===== FOOTER ===== */
.footer { padding: 80px 0 40px; border-top: 1px solid var(--glass-border); position: relative; z-index: 2; }
.footer__inner { display: grid; grid-template-columns: 1.2fr 2fr; gap: 64px; margin-bottom: 48px; }
.footer__brand .footer-logo { font-size: 24px; margin-bottom: 16px; display: block; }
.footer__brand p { font-size: 14px; color: var(--text-dim); }
.footer__links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer__col h4 { font-size: 14px; font-weight: 600; margin-bottom: 16px; color: var(--text); }
.footer__col a, .footer__col p { display: block; font-size: 14px; color: var(--text-dim); text-decoration: none; margin-bottom: 10px; transition: color 0.3s; }
.footer__col a:hover { color: var(--text); }
.footer__bottom { border-top: 1px solid var(--glass-border); padding-top: 24px; display: flex; justify-content: space-between; }
.footer__bottom p { font-size: 13px; color: var(--text-dim); }
.footer__note { font-style: italic; }

/* ===== ANIMATIONS ===== */
[data-anim] { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-anim].visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .tech__grid, .service__grid { grid-template-columns: 1fr; }
  .projects__grid { grid-template-columns: 1fr 1fr; }
  .process__timeline { grid-template-columns: 1fr 1fr; }
  .vision__grid { grid-template-columns: 1fr; }
  .recruit__layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .header__nav {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(13,13,26,0.97); backdrop-filter: blur(20px);
    flex-direction: column; align-items: center; justify-content: center; gap: 32px;
  }
  .header__nav.open { display: flex; }
  .header__nav a { font-size: 20px; }
  .hamburger { display: block; }
  .metrics__grid { grid-template-columns: 1fr 1fr; }
  .projects__grid { grid-template-columns: 1fr; }
  .process__timeline { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 40px; }
  .footer__bottom { flex-direction: column; gap: 8px; }
  .company__table th { width: 120px; }
  .recruit__perks { grid-template-columns: 1fr; }
  .orb { transform: scale(0.6); }
  .hero__title { font-size: 36px; }
}